class Phone:
    IMEI = None
    producer = None
    
    def call_by_5g(self):
        print("5g通话")
        
class NFCReader:
    nfc_type = "第五代"
    producer = "HM"
    def read_card(self):
        print("读取NFC卡")
    def write_card(self):
        print("写入NFC卡")
        
class RemoteControl:
    rc_type = "红外遥控"
    def control(self):
        print("红外遥控开启")
        
class MyPhone(Phone, NFCReader, RemoteControl):
    pass

myphone = MyPhone()
print(myphone.producer)
    
    